Vehicle-spring.



W. E. EASTMAN.

I VEHICLE SPRING.

APPLICATION FILED DBO. 16, 1909.

Patented Sept. 12, 1911 COLUMBIA PLANOGIAPH cnni'ulllmmmll-c.

v UNITED srATns PATENT OFFICE.

WILLIAM EVERARID EASTMAN, 0F BOSTON, MASSACHUSETTS.

VEHICLE-SPRING.

Application filed December 16, 1909.

To all whom it may concern:

Be it known that I, WILLIAM E. EAs'rMAN, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Vehicle Springs, of which the following is a specification.

My invention relates to improvements in vehicle construction and springs, and it ap pertains particularly to the class of elastic supports that maintain the carriage body in position above the axles.

The objects of my improvement, are, first, to secure means to restore the tensive strength of the springs after their partial compression; second, to provide a carriage body supporting base equivalent to an extended wheel-base without changing the position of the axles; third, to obviate the transverse movement and permit the vertical rise of said axles with minimum strain and friction to the radial rods and springs; fourth, to lessen the motion of the carriage body in a vertical direction;fifth, to secure a uniform tension of the springs by increasing the leverage thereof; sixth, to insure when the axles rise a thrust diagonally to the vehicle body; seventh, the provision of an emergency device and in other essential elements hereinafter described.

I attain these objects by the mechanism illustrated in the accompanying drawing forming a part of this specification, in which:

Figure 1, is a plan of a vehicle understruoture suflicient to exhibit my invention. Fig. 2, combines a side elevation, and a longitudinal sect-ion on broken line 2-2, of Fig. 1. Fig. 3, denotes a rear elevation of the same. Fig. 4, is a detail in perspective of the rear axle and its equipment supporting the springs and radial rods. Fig. 5, similarly illustrates the telescopic rods and the assemblage of devices collectively comprising the springs anchorage and tension restoring devices. Fig. 6, is a front perspective of one of the said tension restoring Specification of Letters Patent.

Patented Sept. 12, 1911.

Serial No. 533,459.

members, and Fig. 7, a perspective of the emergency device.

Corresponding numerals of reference designate similar features in the several views, referring to which- 1, indicates the longitudinal channel frame, reflexed at the ends to form the dependent portions or hangers 2 for the purpose pres ently disclosed. 3, represents the tie-plates uniting the frame, while 4 and 5 denote the front and rear axles respectively, with the anchorages for the curved spring extensions shown at 6, there being a plurality of units or compressible members aggregating a spring, the aggrouped elements therefor comprising resilient multipartite supports 7 upholding the frame with its superposed carriage body. Said anchorages also serve for the attachment of the inward ends of the duplex radial rods hereinafter described. These anchorages comprise the integral supports 8, upholding and retaining the individual curved extensions 6 (Fig. 2) forming parts of the springs, and which are forced into the re ceptacles 9 (Fig. 4:) and therein secured by the tap-bolts 10, the protruding section 11 forming additional bearings for the adjustment of said extensions 6. Said anchorages also form the diagonal and downwardly projecting lugs 12 which serve as anchorages in connection with the receptacles 13 seating the inward end fastenings of the duplex radial rods.

The rear anchorages 8, are united by, and supported over the sleeves 1 1 surrounding the revoluble rear axle 5, and secured in the desired position against said sleeves by the bolts 15. In the front axle 4, these anchorages are similarly secured thereagainst, or, if a tubular axle, then with the addition of a sleeve 14, and in the manner described. The terminals of the extensions 6 form the spirals of the springs as at 7, and are seated in the chairs 16 (Fig. 5) the longitudinal reentering angular slots 17 confining them firmly, yet independently, and in a removable manner should occasion require their change. Said chairs control the spring adjustment and are independently revoluble frame.

by the bolts 22, the organized elements be ing supported in the refiexedends 2 of the Said levers near their upper ends have semi-circular transverse depressions 23 (Fig,

\ shaped bearings 24, and the convergent perforations as at 25 (Fig. to? accommodate the oscillatory movement of the said leversiby the nut-s26, ov'erfthe screw threaded ends of the take-up rods 27; during the recuperation manually of the springs. The o'ppOsite. ends of said rods are pivotally attached to brackets 28 (Fig. 1), secured to thecross-bars 29, by-the bolts 30. Theemergency frame sustaining devices, comprise the standard 31 (Fig. 2) secured to. the under side of the, frame 1, and provided with forked members '32 sliding under vertical pressure over said standards, these devices are positioned so as to encompass transversely the curved spring extensions. 6 as observed in Fig. 2 should the carriage frame be depressed below a normal limit ofspring resistance through breakage or otherwise the spring buffer 33 will greatly diminish any collapse should such occur.

The construction of the duplex radial rods is asfollows. Secured to the end portions 2,

of the frame 1, are the tie-rods '34 to which are attachedthe links 35 holding the outward ends of said radial rods 36 and 37 in i V apivotal'; manner, the inward ends of the rods penetrating the receptacles 13 (Fig. 4) in the lugs: 12 of the anchorages 8 and secured 11116136111-fi11d5h1d by the nuts 38 (Fig.

2) the rods 3? (Fig. L) being divergently PQSitioned' in relation to. their fellow members36, for the purpose of restricting certaingmovements' of the carriage axles and sleeve, or sleeves,

Fig. 2 indicates the adjusting. bolts. retaining the curved extensions 6, of the spirals in, a manner that the leverage of the aggroupment .may be uniformly secured and through the diagonal thrust greatly diminish the vibrations of the carriage receivin the corres ondin l a scale as defined by my vehicle spring patent application No. 475,500, filed February 1st, 1909, applying this procedure to the forward and rearward rods 27 consecutively, until each element forming the elastic supports responds to the desired tension.

Obviously there may be other modifications structurally departing from the manner illustrated, such as an integral construction of the spring anchorages and sleeves, and in other minor essentials, therefore I desire not to be held to the strict interpretation herein disclosed, but may use such equivalents therefor as will come within the fair scope and spirit of my invention, which, having thus disclosed, I desire to secure by Letters Patent of the sleeves, the said sleeves, the duplex radial rods secured to the sleeves, pivotal elements to, sustain said rods, a series of rock levers having telescopic bearings and means supported thereon to renew independently the tension. of said springs. after the partial relapse of their sustaining power.

2. In multipart-ite elements composing springs for a carriage frame the combination with telescopic bearings sustained in said frame of a series of rock levers provided with transverse semi-circular depressions near their upper ends and having convergent perforations connecting therewith, bearings positioned in said depressions in a manner to permit the oscillation of said levers and the rod connect-ions to restore the tension of the springs.

3. In an elastically supported frame for vehicles a plurality ofbody supporting elements, a series of radial rods divergent-1y positioned relatively, a series of chairs having reentering angular receptacles, telescopic means for their independent support transversely in said frame, a plurality of roclc'levers coacting with said chairs and means for their attachment to the frame in a manner that the said chairs may be individually oscillated. to increase the tension of said. spirals.

4. In. an elastically supported frame for vehicles provided with integral hangers, telescoping rods sustained by said hangers, a rock lever attached to each rod and having a difierential motion, multiple take-up rods pivotally connected to said frame and communicating with said. rock levers, a plurality of yielding elements collectively forming. springs and means for the oscillatory anchorage of; the rock levers in a manner to secure independent semi-rotatable action of said telescoping elements to recuperate the exhausted tension of said springs.

5. In a resilient supported vehicle frame the combination With the curved spring extensions of an emergency device comprising a forked member encompassing said extensions, a standard attached to the vehicle frame and slidingly secured in said forked member and a buii'er surrounding the stand- 10 ard to cushion any occurring collapse of the elements supporting the carriage body. In testimony whereof I have afiixed my signature in presence of tWo Witnesses.

WILLIAM EVERARD EASTMAN. Witnesses:

C. W. FITZ-GERALD,

CHAS. B. SPENCER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

